Room cooling device



Jan. 1, 1946. E. BABCOCK 2,391,859

ROOM COOLING DEVICE Original Filed Nov. 7. 1931 2 Sheets-Sheet 1 lily] I2 47'5 I44 24 f 46 1 so 20 as 1 J 58 1 I 34 55 32 33 lo Eh 42 I 2.5 m

| 45 I 'mvsm'on .5 I8 Earl 1341x061;

ATTORNEY Jan. 1, 1946. E. BABCOCK- 2,391,859

ROOM COOLING DEVICE Original Filed Nov. 7, 1951 2 Sheets-Sheet 2 INVENT OR Earl Bab cock ATTORNEY Patented Jan. 1, 1946 ROOM COOLING DEVICE Earl Babcock, Duncan, Okla, assignor to The Hoover Company, North Canton, Ohio, a corporation of Ohio Original application November 7, 1931, Serial No. 573,564. Divided and this application October 22, 1937, Serial No. 170,454

38 Claims.

This invention relates to refrigerating apparatuses and more particularly to such an apparatus arranged to cool the air in an enclosure.

This application is a division of my application, Ser. No. 573,564 filed on November 7, 1931, for Room cooling device.

'Heretofore air conditioning units have been proposed which are suitable for use in a room and which employ a refrigerating apparatus to cool the room air. Previous constructions have had serious faults. For example, conditioners now available require water pipe connections to a source of cooling water as well as waste water discharge pipes. Moreover, these units are very bulky, and take up a considerable amount of valuable room space. Also, the entire apparatus is located directly in the room. Thus, not only are the heat absorbing elements of the apparatus lo. cated in the room to be conditioned, but the heat dissipating elements are also located in the room. For this reason, a considerable amount of heat absorbed from the room air by the apparatus is returned to the air because of the presence of the heat dissipating elements in the room.

Another disadvantage inherent in prior art room conditioners is that the motor and the compressor of the refrigerating apparatus are located in the room. Motors and compressors are necessarily noisy in operation, and frequently this noise is greatly amplified by the vibration of the cabinet walls and other parts of the apparatus.

Prior devices have also been deficient in that they make no provision for bringing fresh air into the room, but merely cool and recirculate the air within the room. Needless to say, this is a very serious disadvantage, and renders the use of room :onditioners unsuitable for many purposes.

According to the construction herein disclosed, I have overcome the many disadvantages of prior air conditioning units. No water connections are required as my apparatus is so constructed that the heat from the room air is discharged directly to the atmosphere. An important feature in this connection, is the fact that the atmospheric cooling air is not brought into the room being conditioned, nor are the heat dissipating elements located in that portion of the unit within the room..

It will therefore be apparent that according to my construction, the heat dissipating elements may be made as large as necessary for efilcient operation without utilizing valuable space within the room.

Since the heat dissipating elements are located outside the room, there is no possibility of heat loss from the apparatus to the room.

In spite of the fact that a portion of my apparatus is intended to be located outside the room, and part within the room, yet the apparatus is so designed that it may be constructed as a unitary structure. Moreover, I propose to so design the apparatus that it may be employed in any room having a window without necessitating any changes or alterations in the room itself.

Another feature of my invention is that only the heat absorbing portion of the refrigeration apparatus is located in the room. Moreover, even this small element is intended to be located on a window sill or in a space not usually employed for other purposes.

According to my construction, a supply of conditioned, fresh air may be had in any quantity and as desired. At certain times, fresh air may be unnecessary, and in this event a very simple operation sufllces to discontinue the supply of fresh air.

Another feature of the invention resides in the provision of means for circulating room air from the opposite sides of the unit over a heat absorbing element and then upwardly into the room. Consequently the air is cooled and delivered upwardly into the upper portion of the room, and then settles gradually towards the floor. Moreover, the air is discharged from the unit in a large number of small streams emanating from a large surface area of the unit.

Other objects and advantages of my invention reside in the provision of a room air conditioner which is small, compact and portable. A further object is the provision of a room conditioner which does not require any alteration of the room in which it is to be used. Another object of the invention is to provide a room conditioner which not only cools and circulates the air in a room, but which functions to dehumidify the air and to add a desired amount of conditioned, fresh air to the room air.

'Still other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings inwhich:

Figure l is a horizontal, cross sectional view through the casing of the refrigerating apparatus on line l--l of Figure 2 embodying the principles of the invention and showing the apparatus in a plan view;

Figure 2 is a vertical, cross sectional view of the apparatus of Figure 1 taken on the line 2-2 thereof;

Figure 3 is a vertical cross sectional view of the refrigerating apparatus shown in Figures 1 and 2 taken on line 3-3 of Figure 2, and showing how the parts of the unit outside of the building are disposed;

Figure 4 is a cross sectional view of the apparatus of Figures 1, 2 and 3 taken on the line 4-4 of Figure 2, and showing how the parts inside of the building are arranged.

In the accompanying drawings the room cooling apparatus is shown arranged ina casing or housing designated by the reference character I 0. This apparatus is of such a shape as to be supported upon a window sill in a room to be cooled. A wall of the building is designated by the reference character ll while the window is indicated at I2. The apparatus is placed in position merely by raising the window l2, placing the unit upon the window sill, and then bringing the window I 2 down upon the top of the casing III, the latter being provided with an angle shaped portion as indicated at I: corresponding or conforming to the shape of the window sash,

In view of the fact that the window sills of different buildings are of varying thicknesses and width, the casing should be so designed as to maintain a substantially air tight seal with the window frame. To this end the lower portion of the casing III, which is fitted to the window sill, has a straight inner portion extending for some distance from the flange of the sill inwardly as indicated at I4, The apparatus is further provided with adjustable clamps I5 for causing the angled portion it of the lower portion of the easing to engage snugly with the sill.

Extending outwardly through the window and downwardly alongside of the wall of the building is a housing IT. This housing is made integraliy with the portion of the apparatus supported upon the window sill within the room and includes a, reduced portion between the downwardly extending portion outside the room and the evaporator housing in the room. Housing II serves not only to house the heat dissipating elements of the apparatus, but also as a duct or air passageway for the atmospheric cooling air. Blocks of rubber, cork or the like may be inserted as indicated at l8 between the over-hanging portion I 1 of the casing and the wall of the building. In addition to this, it may be found advisable in some instances to place a rubber mat or other heat insulating means, not shown, between the casing in and the top of the window sill, and between the casing l0 and the window I 2 in order to dampen vibrations and to reduce heat leakage.

The casing may be made the same width as the window in which it is to be fitted, or it may be provided with adjustable extensions or the like to permit it to be accommodated to various window widths.

Preferably, a partition of insulating material is provided in the reduced portion of the unit between the inner horizontal portion of the casing i0 and the downwardly extending portion of the housing I! located outside the window, as has beenclearly indicated in Figures 1 and 2. Within the housing l1. constituting the cooling air passageway are located the heat dissipating elements of the refrigeration apparatus. These elements consist of a motor-compressor unit 2| and a condenser 22. As shown, the condenser is divided into two portions which are located on either side of the motor-compressor unit. A fan 23 is mounted upon a shaft so extending from the motor- Evaporator 2s consists of a continuous pips formed into three serpentine coils positioned as clearly shown in Figure 1. The evaporator is provided with an expansion valve 25, and air circulating fans 26, 21 and 29 are mounted to draw room air from opposite ends of the unit into the unit, then over the evaporator coils 24, and finally force it upwardly into the room through openings 4| in the top of the casing ID. A thermostatic switch 25' of conventional form is shown positioned within the portion of the casing II which houses the evaporator to control the operation of the motor-compressor unit and the air circulating fans in accordance with the temperature of the air flowing over the evaporator. If desired, the thermostatic switch 25' may be positioned at any convenient point in the room to be conditioned so as to control the operation of the motor-compressor unit and the fans in accordance with room air temperature.

The air circulating fans 23, 26, 21 and 28 may be driven by individual motors or through suitable connections to the motor of the motor-compressor unit 2|. In the arrangement illustrated, a shaft 30 extends from one of the end walls of the motor-compressor unit and is connected to the electric motor therein, through a stuffing box or magnetic clutch 3|. The magnetic clutch is used in lieu of the stumng box, in case the motorcompressor unit is hermetically sealed, such arrangement being well known in the art.

The shaft 30 carries the fan 23 and also a bevel gear 32. A transversely extending shaft 33 extends through the insulating partition 20 into the interior of the casing located in the room to be cooled, and is driven by means of a second bevel gear 34 in mesh with the gear 32. The fans II,

'21, and 28 may all be driven by the shaft ll through the belt and pulley connections illustrated at 35 and 36.

The evaporator 24 is mounted in that portion of casing I ll located within the room to be cooled, and consists of three sets of coils or reversely bent pipes connected in series, as clearly shown in Figure 1. For purposes of illustration, only one layer of pipe is shown, but it is obvious that several layers may be employed and so arranged as to expose a large heat transfer area to the current of air generated by the fans 26, 21 and 28.

. Air directing baflles or partitions 31 and 38 are placed between the three sets of coils of the evaporator so as to cooperate with the fans 2!, 21 and 28 in causing air to enter the casing ll from the opposite ends thereof through louvers 38 and 40, and thenpass across the end coils of the evaporator, and then across the central coil. As will be evident from Figure 1, the two air stream entering at 39 and 40 and passing over the end coils of the evaporator unite in the vicinity of fan 21, The single air stream so formed is then blown over the central coil by fan 21. After passing across the central coil of the evaporator, the air will have been thoroughly cooled and dehumidified and suitably conditioned for use in the room. This conditioned air is blown upwardly through the large number of openings 4| in the central top portion of easing l0.

As will be evident from the drawings, fan 28 is positioned adjacent one end of the housing IT. The entire bottom side of this housing is open to the atmosphere. When the motor-compressor unit is operating, fan 2? creates a low pressure area between the fan and the adjacent end of housing I1, and a high pressure area on the opposite side of the fan. Consequently atmospheric air flows upwardly into the low pressure area just described, as well as through the louvers 44 in the end of the duct I! as shown in Figures 1 and 3 and is then blown in a generally horizontal direction through housing I! and over the heat dissipating elements 22 and 2t therein. Since the heat dissipating elements are much warmer than the atmospheric air. a considerable amount of heat is discharged to the atmospheric air, and the air so heated finally discharges from the lzigusing I! at the lower end thereof opposite fan From the foregoing description of the air circulating means, it will be seen that I have provided a fan system 26, 21 and 28 for circulating two streams of room air from opposite sides of the unit over the cooling elements therein, and then delivering the cooled dehumidified air upwardly into the room in a large number of small streams. I have also provided an atmospheric air circuit over the heat dissipating elements in housing I! in which an atmospheric air stream independent of the room air stream is circulated through the housing by fan 23. Provision is made, however for admitting a certain amount of outside air and for passing it over a portion of the evaporator to cool the air in order that a esired amount of fresh air may be admitted to the room. In the arrangement shown, this end is accomplished by providing a small opening 45 in the partition 20 near the fan 26, and a manually controlled door or damper 46 for this opening. Damper 46 may be operated through a suitable link mechanism by a handle projecting above the top of casing in as clearly shown in Figure 2. Preferably damper 46 is so constructed that when placed in one position by handle 41, no fresh air is delivered to the room through opening 45, but when in another position, a very considerable amount of fresh air is delivered to the room while only a very small volume of room air is brought into the air conditioner through the louvers at 40. In other words, damper 46 serves to control the fresh air flow through duct 45 at one time, and the flow of room air through louvers In at other times. If desired, a suitable filter may be placed in opening 45 to remove foreign particles contained in the fresh air entering the room.

If the relative humidity of the room air becomes very great, the air passing over the evaporator coil 26 is apt to become so cold that moisture will settle out on the evaporator coil. I have therefore provided a drip pan 42 resting on the bottom of casing I below the evaporator unit for collecting any drip water. This drip water drains to a sump in the drip pan adjacent partition 20. In order to avoid the necessity for a drip water drainage connection, I have provided a drain pipe 43 leading into the path of the hot atmospheric air being discharged from housing i1. Hence, pipe d3 is maintained in a warm condition by the hot air passing thereover, and the small amount of water, which is never greater than a trickle passing through pipe 43, readily vaporizes into the atmospheric air being discharged from housing I1. But even though this water should not vaporize, it will simply drip from the end of conduit 43 on to the ground outside the room I I. It will be understood of course that it is never necessary to defrost the evaporator because I prefer to so design the refrigerating apparatus and the evaporator coils, that the evaporator never reaches a temperature below the freezing point of water. Therefore, not only will the coils never become frosted, but the room air will-not become dehumidifled to too great an extent. It will be understood of course that evaporator coils 2 as well as condenser coils 22 may be provided with a large number of heat conducting flns in accordance with known practices in the heat exchange art.

Various alterations and accessories may be provided in the air conditioning unit herein illustrated and described without departing from the spirit of my invention. For example clamping means may be provided on the top of casing ID to suitably lock the window l2 to prevent it being raised by unauthorized persons. Although the casing for the apparatus as shown in the drawing is made of one piece, it will be appreciated that this casing can be made in various parts to facilitate construction, installation and inspection of the apparatus when in use. To this end the top portion of the casing maybe removable from the lower part or hinged thereto so as to permit ready inspection and repair of the unit. Likewise various other parts of the casing may be made removable if desired. No attempt has been made to show the details of the refrigeration apparatus itself since such details form no part of this invention. The motor-compressor unit, for example, may be of the type shown in the patent to Crane, No. 1,704,655, and may be hermetically enclosed or not as desired. As is clearly shown in the drawings, the refrigeration unit is mounted within and supported by the easin of the unit.

The installation of the air conditioning unit in a room is obviously very simple. All that is required is the placing of the unit upon a window sill after the lower part of the window has been raised. The window is then lowered against the top of the casing and secured in placed by suitable clamping means not shown. Clamping devices l5 should also be tightened, and insulating strip I 8 inserted between housing I! and wall II to prevent imdue vibration of the unit. Since the conditioning unit is entirely air-cooled, it will be unnecessary to connect a water supply thereto, nor will it be necessary to provide a connection for drip water since this water is vaporized and passed into the hot air discharged from the air passageway in housing l1. Moreover it is unnecessary to make any alteration in th room in which the device is located.

In operation, assuming that the thermostatic control device 25', and which may be of any of the well known types for controlling a refrigeration apparatus, calls for a lowerin of the room temperature, the refrigeration apparatus is placed in operation automatically. At the same time the cooling air fan 23 and the room air circulating fans 26, 21 and 28 are placed in operation. Room air is conducted into the opposite ends of the cooling chamber through louvers 39 and 40. The room air is thus led in two streams over the sections of the evaporator coil located inthe opposite. end portions of the unit. These two streams of air are then united in the vicinity of fan 21 and conducted simultaneously over the central section of the evaporator. If the relative humidity of the room air is high, a certain amount of the moisture will settle out on the evaporator and finally fall into drip pan 42. Therefor the room air is first cooled and then simultaneously dehumidified and further cooled before being returned to the room through the large number of small openings in the top of the unit. At this point it should be noted that the cooled, dry air is discharged upwardly into the top portion of the heat dissipating elements 2| and 22 located in housing I! outside the window. This heat is then dissipated to the atmospheric air by passing a stream thereof over the entire heat dissipating portion of the apparatus. As has been explained hereinabove, this operation is carried out by means of fan 23 which draws atmospheric air into one end of housing I! and then passes it transversely across the condenser coil 22 and the motor-compressor unit 2 I. The hot atmospheric air is then discharged directly back into the outside air without giving up any of its heat to the air within the room, and without any portion of the cooling air being conducted into the room being conditioned. It will also be observed that the cooling air passageway also serves to house the heat dissipating elements 2| and 22 as well as the air circulating fan 23.

When desired a certain amount of fresh atmospheric air may be admitted through duct 45 in partition 20 to th air being circulated through the heat absorbing portion of the apparatus. This air flow is manually controlled by means of damper 48 and handle 41 as explained hereinabove. As also previously explained, damper 46 not only serves to control the flow of fresh air into the room but under certain conditions may also control the flow of room air into the cooling apparatus through louvers 40. Whenever the temperature of the room air has become sumciently lower, the automatic thermostatic control functions to de-energize the motor-compressor unit and to thereby discontinue the cooling and circulating of the room air as well as of the cooling air.

While only one embodiment of the invention has been shown and described, it will be apparent that many changes may be made in the construction and arrangement of parts without departing from the spirit of the invention or the scope of the annexed claims.

I claim:

1. An air conditioning unit comprising, in combination, an evaporator, means for circulating room air thereover, means providing an atmospheric air passageway communicating with the outside air and projecting rearwardly from said unit, a condenser disposed within said passageway, means for circulating outside air inwardly of said passageway and over the condenser therein, and means for collecting condensate from said evaporator and conducting it through said pro- J'ecting means and disposing of the same into the outside air.

2. A unitary, portable air conditioning unit having a casing which includes a horizontally elongated portion and a downwardly extending portion at one end of said first mentioned portion, said horizontally extending portion being constructed and arranged to extend through an opening in the wall of a room to be conditioned.

in such manner that said downwardly extending portion is positioned against the wall ofsaid room, a tightly sealed motor-compressor unit and an air cooled condenser in said last named portion, blower means operable to circulate atmospheric air over the condenser and motorcompressor and discharge the resultant heated air back to the atmosphere, an evaporator coupled to said compressor and condenser, situated at a higher elevation, and separated therefrom by an insulated partition, blower means for passing room air over said evaporator and discharging the air back into the room from an upper portion of said unit and in a direction at an angle to the horizontal, and means for disposing of condensate from said room air directly to the outside atmospheric air.

3. In the art of air conditioning by means of a sell. contained apparatus of the type having a casing enclosing an air cooled refrigeration apparatus including a heat absorbing portion and 'a heat dissipating portion, means for circulating room air over the heat absorbing portion to cool and dehumidify the room air, and means for circulating atmospheric air over the heat dissipating portion whereby said portion is cooled and said air is heated, that improvement which comprises collecting the moisture removed from the room air and discharging the same from the apparatus by passing it in a confined stream through said heat dissipating portion and discharging it in liquid form into the atmospheric air.

4. A unit air conditioner comprising a housing structure of horizontally elongated form and comprising upper and lower horizontally elongated compartments, an elongated motor compressor unit disposed horizontally in said lower compartment, said upper compartment having an inlet at one end and an outlet at the top thereof, an evaporator coil disposed in said upper compartment in a direction the major component of which is horizontal, and means for circulating air inwardly through said inlet, over said coil, and upwardly through said outlet.

5. A unit air conditioner comprising a housing structure of horizontally elongated form and comprising upper and lower horizontall elongated compartments, an elongated motor compressor unit disposed horizontally in said lower compartment, said upper compartment having an inlet at one end and an outlet at the top thereof, an evaporator coil disposed within said upper compartment, and means for circulating air inwardly through said inlet, in contact with said evaporator coil, and upwardly through said outlet.

6. An air conditioning unit comprising in combination, an evaporator, means for circulating room air thereover, means providing an atmospheric air passageway projecting rearwardly from said unit for communication with the outside air, condenser elements laterally oifset from said evaporator and disposed within said passageway, means for circulating outside air inwardly of said rearwardly projecting passageway over the condenser elements disposed therein, and means to facilitate the condensate disposal by subjecting the condensate to the heat or the condenser elements.

7. An air conditioning unit comprising in combination, a casing having a pair of laterally offset compartments positioned at diiferent elevations, one of said compartments containing an evaporator for cooling room air, the other of said compartments "containing a condenser and compressor in circuit with the evaporator, together with means for transferring moisture from the room air into heat exchange relationship with air being circulated over the condenser to facilitate the disposal of such moisture.

8. An air conditioning unit comprising in combination, an evaporator, means for circulating room air thereover, means providing an atmospheric air passagewa projecting rearwardly from said unit for communication with the outside air, a condenser disposed within said passageway, means for circulating outside air inwardly over the condenser disposed therein, together with means for disposing of the condensate formed on the evaporator, through the outside air passageway.

9. Air conditioning apparatus of the type adapted to cool and dry large volumes of air for the comfort of human beings and the like, comprising in combination, a casing, a portion of which is constructed and arranged to be located in a room to be conditioned and a portion of which is constructed to project through an opening in a wall of the room and to communicate with the outside atmospheric air, said casing housing an evaporator within the room portion, a motor driven compressor and a condenser housed within the projecting portion for supplying a refrigerant medium to said evaporator, means for circulating room air over the evaporator to cool and dry the air and to return the cooled dried air to the room, means for circulating air derived from a point outside the room being conditioned about the compressor and condenser to cool the compressor and condenser and discharging said air back to the outside atmosphere, and means for transferring moisture condensed from the room air by said evaporator into heat exchange relationship with the hot outside air stream being circulated over said motor, compressor and condenser to facilitate the disposal of the moisture from the apparatus to the outside air.

10. The combination, with a wall of a confined area, of a unit for conditioning the air therein, said wall having an opening and said unit comprising means within the confined area for cooling the air therein, means positioned outside the confined area for supplying refrigerant to saidfirst-mentioned means, a casing extending through the opening in said wall and arranged to house both of the aforementioned means, and means for collecting condensate formed during operation of said unit and disposing of said condensate through the casing and into the outside atmosphere.

11. In the art of air conditioning for human comfort by means of a. self-contained, portable apparatus of the type having a casing enclosing an air-cooled refrigeration apparatus including a heat absorbin portion and a heat dissipating portion, means for circulating room air over the heat absorbing portion to cool and dehumidify the room air, and means for circulating atmospheric cooling air over the heat dissipating portion whereby said portion is cooled and said air is heated, that improvement which comprises collecting moisture removed from the room air and discharging the same from the apparatus by passing it into heat exchange relation with air heated by contact with a portion of said heat dissipating portion and discharging the moisture into the atmospheric cooling air, said discharge of moisture being carried out during the operation of said refrigeration apparatus and while additional moisture is being collected from said heat absorbing portion.

12. In a portable air conditioner having an evaporator located within an enclosure, means for circulating air from said enclosure thereover to cool and partially dehumidify the air, means for collecting moisture condensed from the air passing over the evaporator, means for conveying the moisture to a point outside said enclosure,- a condensing unit connected to said evaporator, a portion of said unit being located outside the enclosure, and said conveying means and unit being constructed to utilize heat absorbed by said evaporator and dissipated by said condensing unit for evaporating at least a portion of said mosture and disposing of the same 11117001165163 atmospheric air.

13. In an air conditioner for a room, an evaporator exposed to the main air body in said room, a refrigerant liquefying unit insulated from said main air body and connected to said evaporator, means for conveying moisture extracted from said air by said evaporator to the exterior of said room, said conditioner being constructed to evaporate at least a portion of said moisture in said exterior.

14. In a room or the like, a window, a heat absorbing unit in said room, an extension on said unit passing through said window, heat dissipating means mounted in said extension without the room, refrigerant fiow conduits between said unit and said means, and means for discharging moisture condensed from the air in the room, the last mentioned means passing through said window.

15. In an air conditioning unit, a casing, means within the casing for forming within the casing a first passageway and a second passageway, refrigeration apparatus within the casing including an evaporator, condenser and motor-compressor, a portion of said evaporator being located in said first passageway, means for drawing air from a first source and for routing said air through said first passageway exclusively, means for drawing air from another source and routing said last mentioned air through said first and second passageways, means for supplying to the enclosure served by the unit air from said first and second passageways, and means for collecting condensate from said evaporator and discharging the same into the air at one of said sources.

16. A unitary air conditioning apparatus comprising a casing having side walls and a top wall, partition means dividing said casing into a plurality of compartments, refrigeration apparatus including an evaporator and a condensing unit, said evaporator and said condensing unit being located in different compartments, an opening from the room to be conditioned in a side wall of said casing and opening into a compartment con taining the evaporator a discharge opening for said room air in the top of said casing, means for passing outside atmospheric air over said condensing unit and discharging the same to the outside atmosphere, controllable means for by-passing some of said outside air to the room air flowing over the evaporator, and means for collecting condensate from said evaporator and conducting the same into the compartment containing said condensing unit and disposing of the same into the air after the condensate has passed in heat exchange relation with air heated by contact with said condensing unit.

17. A portable room air conditioning apparatus of the self-contained, air-cooled type comprising a casing containing two horizontally elongated compartments located at different elevations, a

substantially flat evaporator coil in th compartment at the higher elevation, a room air 7 inlet to said evaporator compartment in a side wall of said casing, a plurality of upwardly discharging'room air outlets from said evaporator compartment, blower means for circulating room air through the evaporator compartment and back toward the upper portion of the room, an

air-cooled condensing unit including a motorcompressor and a condenser coil in the compartment at th lower elevation and operatively connected to the evaporator to supply refrigerant thereto, blower means for circulating outside atmospheric cooling air over said condensing unit and then back to the atmosphere, means for collecting condensate from said evaporator, means for conducting the condensat from the evaporator compartment to the condensing unit compartment and then discharging the same to the atmosphere, and an air conducting passageway interconnecting said condensing unit and evaporator compartments provided with manually operable means for controlling the flow of air between said compartments.

18. A portable, air-cooled room air conditioning apparatus comprising a housing having vertical side and end walls and a top, a plurality of compartments in said housing, refrigeration apparatus within said housing including an interconnected evaporator coil and a condensing unit, said evaporator being located in a diil'erent compartment than said condensing unit and at a higher elevation, a room air inlet to said evaporator compartment in an end wall of said housing and supplying room air directly to said evaporator coil, room air outlets from said evaporator compartment in the top of said housing. said condensing unit being located in a compartment constructed and arrangedto provide an outside atmospheric cooling air passageway for the air cooling of said condensing unit, means for collecting condensate from said evaporator and conducting the same into said conde ng unit compartment for disposal from th apparatus, an air passageway connecting said evaporator and said condensing unit compartments, and power driven means for circulating a stream of outside air through said condensing unit compartment and room air through said evaporator compartment including a single blower means positioned to circulate the air through one of said compartments and through the air passageway connecting said evaporator and condensing unit compartments.

19. A portable, self-contained room air conditioning apparatus comprising a casing having an upper room cooling air compartment and a refrigeration apparatus compartment at a lower refrigeration apparatus compartment at a lower level, said room air compartment having air discharge openings in the top thereof and a room air inlet opening spaced below said top, said apparatus compartment being adapted when in use to communicate with the air outside the room being conditioned, a condensing unit in said apparatus compartment, an evaporator in said room air compartment and above a major portion of said condensing unit, an air passageway extending between said apparatus and room air compartments for the passage of air therebetween, spaced blower means associated with each of said compartments for circulating room air through one and outside cooling air through the other of said compartments, one of said blower means being so positioned with respect to the air passageway extending between the apparatus and room air compartments as to also cause air to flow through said passageway from one compartment to the other, and a common prime mover for said condensing unit and for said one blower means which is positioned to circulate air from on compartment to the other and to circulate a stream of air through one of the compartments.

21. A self-contained portable air conditioning apparatus of the portable, aircooled typ and adapted to condition an inhabited room, said apparatus comprising a casing having a room air inlet and a room air outlet in the top thereof; said casing also being provided with opening means for circulating a stream of outside atinospheric air into and then out of said casing back to the outside air, an insulating partition within said casing dividing the same into a first chamber in communication with said room air inlet and outlet, and a second chamber through which said outside air stream may circulate, a

mechanical refrigeration apparatus housed by level, said room air compartment having air discharge openings in the top thereof and a room air inlet opening spaced below said top, said apparatus compartment being adapted when in us to communicate with the air outside the room being conditioned, a condensing unit in,

said apparatus compartment, an evaporator in said room air compartment and above a major portion of said condensing unit, an air passageway extending between said apparatus and room air compartments for the passage of air therebetween, spaced blower means associated with each of said compartments for circulating room air through one and outside cooling air through the other of said compartments, one of said blower means being so positioned with respect to the air passageway extending between the apparatus and room air compartments as to also cause air to flow through said passageway from one compartment to the other, and a common prime mover operatively connected to drive both oi said blower means. 20. A portable, self-contained room air conditioning apparatus comprising a casing having an upper room cooling air compartment and a said casing including a condensing unit in said second chamber and an evaporator located in said first chamber, the average elevation of said evaporator being substantially above the average elevation of said condensing unit, said condensing unit being operatively connected to the evaporator to supply liquid refrigerant thereto, an air passage between said chambers, power driven means in said first chamber positioned to draw air through said passage and from the room through said inlet, pass the two air streams over the evaporator to cool and dehumidify the same, and then to discharge the cooled, dried air upwardly into the enclosure to condition the same, a second power driven means positioned to circulat outside cooling air through said second chamber and over the condensing unit therein to cool the same, and then discharge the air to the outside again, a condensate collecting means in the first chamber to collect moisture condensed out of the air by the evaporator, and means for conveying said condensate to said second chamber and wasting the same into the outsid air, said conveying means being positioned so that the outside cooling air stream flows therepast after said stream has passed into contact with the condensing unit and become heated thereby.

22. A self-contained, portable room air conditioner, comprising a housing structure of horizontally elongated form and divided into horizontally elongated compartments arranged at different levels, an elongated motor-compressor unit disposed horizontally in the lower one of said com- D rtments, the upp r of said compartments havunit of the air-cooled type comprising a casing ineluding a portion extending through the window to a point outside thereof and a second portion extending through the window and into said room, partition means dividing said easing into two compartments, a refrigeration apparatus comprising an evaporator coil on the room side of said partition, and a hermetically sealed motorcompressor unit and an air-cooled condenser on the opposite side of said partition from said evaporator, said evaporator being positioned above said motor-compressor unit, a room air inlet to said evaporator compartment at a point below the top of the casing, and a room air outlet from said compartment discharging upwardly into said room, power-driven blower means for circulating outside atmospheric air into said casing, over said condenser and motor-compressor unit and back to the atmosphere, a controllable fresh air passageway extending between said two compartments, and power driven means for circulating room air to be cooled and a controlled amount of outside fresh air over said evaporator and discharging the same upwardly into the room.

24. The combination, with a wall of a confined area, of a unit for cooling and dehumidifying the air therein, said wall having an opening and said unit including two compartments one of which is in communication with said confined area and the second of which is in communication with the air outside said area, an evaporator in said one compartment to cool and dehumidify the air circulating therethrough from the confined area, means in said second compartment for supplying liquid refrigerant to said evaporator, said last mentioned means including a condenser located outside the wall of said confined area and laterally offset from said evaporator, a casin extending through the opening in said wall and arranged to house said evaporator, said condenser and refrigerant liquid supply means, means in said unit providing restricted communication between said confined area and the outside air, and means for collecting condensate formed during operation of said unit and disposing of said condensate through the casing and into the outside atmosphere.

25. A unitary, portable air conditioning unit for cooling, dehumidifying, recirculating and ventilating the air of a room, said unit having a casing which includes a horizontally elongated portion and a downwardly extending portion at one end of said first mentioned portion, said horizontally extending portion being constructed and arranged to extend through an opening in the wall of a room to be conditioned in such manner that said downwardly extending portion is positioned against the outside wall of said room, a tightly sealed motor-compressor uni-t and an air-cooled condenser in said last named portion, blower means operable to circulate atmospheric air over the condenser and motor-compressor and discharge the resultant heated air back to the atmosphere, an evaporator coupled to said compressor and condenser, situated at a higher elevation, and separated therefrom by an insulated partition, blower means for passing room air over said evaporator and discharging the air back into the room from an upper portion of said unit and in a direction at an angle to the horizontal, means including an air passageway between said horizontally and downwardly extending portions for ventilating said room, and means for disposing of condensate from said room air directly to the outside atmospheric air.

26. A self-contained, portable air conditioning apparatus constructed and arranged for mounting across a window sill of a room to be conditioned, said apparatus comprising a casing divided into a plurality of chambers one of which is arranged for the circulation of room air therethrough and another of which is arranged for the circulation therethrough of air outside said room, an evaporator in the room air chamber and in the path of air circulation, a condensing unit in said chamber through which the outside air circulates, and laterally oflset with respect to said evaporator, means for positively circulating separate streams of air through said apparatus, one of said streams passing over the evaporator and the other passing over the condensing unit, said last mentioned means including means for diverting a controllable amount of one air stream to the other to ventilate said room, and means for collecting moisture separated from th air stream flowing over said evaporator and discharging it into the air outside said room.

27. In combination, a self-contained, portable air conditioning apparatus constructed and arranged for support upon and mounting across a window sill of a room to be conditioned, said apparatus comprising a casing divided into a plurality of chambers laterally positioned with respect to one another, one of said chambers being in communication with the room and another thereof being in communication with the air outside said room, an evaporator in said room air chamber, condensing unit elements in said outside air chamber and connected to said evaporator, separate means for positively circulating separate streams of air one of which passes over said evaporator and is cooled and dehumidified and another of which passes over said condensing unit elements and is heated, said last mentioned means including means for diverting a controllable amount of one of said streams to the other of said streams to ventilate said room, each of said air circulating means as well as said condensing unit being of the type requiring a source of power to actuate the same, a common prime mover coupled to drive at least two of said power requiring means, and means for collecting moisture separated from the air stream flowing over said, evaporator and conducting it through a path in close proximity to one of said condensing unit elements,

28. In an air conditioning unit, a casing, means within the casing for forming within the casing a first passageway and a second passageway, refrigeration apparatus within the casing including an evaporator, condenser and motor-compressor, a portion of said evaporator being located in said first passageway, means for drawing air from a first source and for routing said air through said first passageway exclusively, means for drawing air from another source and routing said last mentioned air through said first and second passageways, means for supplying to the enclosure served by the unit air from said first and second passageways, means for controlling the flow of air to said second passageway from said other source, and means for driving both of said means for drawing air by the motor of said motorcompressor.

29. In combination with a window casing, a self-contained, unitary room air conditioning device including a casing mounted upon said window casing, an insulating partition in said casing, an evaporator mounted in the casing on one side of said partition, air-cooled heat discharging means mounted on the other side of said partition, an air passageway through said partition, and means for causing outside fresh air to flow through said passageway and over a portion of said evaporator.

30. In combination with a window casing, a self-contained, unitary room air conditioning device including a casing supported upon said window casing, a partition in said casing, an evaporator mounted in the casing on one side of said partition, air-cooled heat discharging means mounted on the other side of said partition, an air passageway through said partition, means for causing a stream of outside atmospheric air to flow over said heat discharging means and another stream of outside air to flow through said passageway and over said evaporator, and means for regulating the flow of air through said passageway.

31. In combination with a wall of a building having a window in a room thereof, an air conditioning unit projecting through said window comprising, a combination, an evaporator disposed at the room side of said wall, means supporting the evaporator within said room, means for circulating room air over the evaporator, means providing an atmospheric air passageway disposed at the exterior side of said wall, a condenser disposed within said passageway wholly outside said room, means in said air passageway for circulating outside air over'the condenser therein, and means for collecting condensate from said evaporator and conducting it through said passageway, said means being so related to the parts of said unit as to condition said condensate for vaporization.

32. In a portable air condtioner having an evaporator located within an enclosure, means for circulating air from said enclosure thereover to cool and partially dehumidify the air, means for collecting moisture condensed from the air passing over the evaporator, a condensing unit connected to said evaporator, a portion of said conditioner being located outsid the enclosure and means for conveying said moisture outside said enclosure and disposing it into outside atmospheric air, said means being so related to the parts of ,said conditioner that heat absorbed by said evaporator and dissipated by said condenser is utilized for evaporating at least a portion of said moisture.

33. A self contained air conditioning unit for a room, two ducts, one extending through the other and attached to and extending from a portion of said unit adapted to be located in a room to a point exteriorly of said room, said unit including a heat absorbing unit for cooling the room air and means for dissipating heat absorbed thereby, means expelling hot air passed over said heat dissipating means through one duct and means conducting condensate collected from the room air by said heat absorbing means and discharging the condensate through the other duct.

34. A self contained unitary encased air conditioning apparatus for a room comprising an air duct communicating with the air exteriorly of said room, refrigerating apparatus including an evaporator adapted to cool the room air and a condensing unit separated from the room air, means circulating a current of air through said duct in heat exchange relation withsaid condensing unit of said air conditioning apparatus and back to the exterior air, and means including a second and smaller duct passing through said first mentioned duct for conveying condensate to the exterior of the room.

35. An elongated self contained air conditioning unit including an evaporator extending substantially the full length of said unit, a condenser, casing means surrounding said evaporator and condenser, said casing means supporting said evaporator in one portion thereof and said condenser in another portion thereof to the rear of said evaporator and providing room air inlets to said evaporator at opposite ends thereof, motor driven propeller f I ns for circulating room air through said openings into said casing means and over said evaporator and means for circulating outside air into said casing and over said condenser to cool the same.

36. The combination with an enclosure having a window in a wall thereof, of a unitary self contained conditioner unit extending from point inside said enclosure, through said window to a point outside of said enclosure and including a casing extending into said enclosure, an evaporator containing refrigerant supported in said casing within said enclosure, heat dissipating means including a translating device and a condenser, conduit means connecting said evaporator and said heat dissipating means, at least a portion of said heat dissipating means being located outside of said enclosure, a portion of said conduit means passing through said window, and means for discharging moisture condensed from the air in said enclosure by said evaporator to the outside of said enclosure.

3'7. The combination with an enclosure having a window in a wall thereof, of a conditioner unit extending from a point inside said enclosure through said window to a point outside of said enclosure and including a casing extending into said enclosure, an evaporator containing refrigerant supported in said casing within said enclosure, heat dissipating means including a refrigerant translating device and a condenser; conduit means connecting said evaporator and said heat dissipating means, at least a portion of said heat dissipating means being located outside said enclosure, a casing for said portion located outside said enclosure, and means for conveying moisture condensed from said air in said enclosure and disposing of the same into outside atmospheric air. I

38. A unitary portable air conditioning apparatus for cooling and dehumidifying a, room comprising a casing constructed for portable location in said room and having air inlets and air outlets for, communicating with said room, a heat absorbing unit in said casing and means for circulating air from said room through said inlets and over said heat absorbing unit and through said outlets back to said room, a heat dissipating unit connected to said heat absorbing unit and forming a part of said unitary portable apparatus, and means for releasing the moisture extracted from the air circulated through said casing as it passes over said heat absorbing unit, in liquid form exteriorly of said room.

EAR-L BABCOCK.

- Disclaimer 2,391,859.-Earl Babcock, Duncan,j0k1a. Room COOLING Dmncn. Patent dated Jan. 1, 1946. Disclaimer filed July 28, 1950, by the aseignee, The; Hoover Company.

Hereby enters disclaimer to claims 6, 7., 9, 11, 12, 13, 16, 21, 27, 31, and 32 of said specification. I

[Ofim'al Gazette August 22, 1950.] 

